Brake mechanism for vehicles.



G. S. ALBANESE. BRAKE MECHANISM FOR VEHICLES.

APPLICATION FILED MAY 2. 1913- LZQ8 Q56B Patented Nov. 7, 1916.

2 SHEETS -SHEET I.

G. S, ALBANESE.

BRAKE MECHANISM FOR VEHICLES.

APPLICATION FILED MAY 2. 1913.

1 2% 956. Patented Nov. 7, 1916.

2 SHEETS-SHEET 2.

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GIUSEBPE SACCO ALIBAN ESE, 0F PARIS,FRANCE, ASSIGNOR T0 ETHEL L. NOBLE,OF

BROOKLYN, NEW YORK.

To all whom it may concern:

Be it known that I, GIUSEPPE SACCO AL- .BANESE, a subject of the King ofGreatBritain and Ireland, residing at Paris, in the Republic of France,have invented new and useful Improvements in Brake Mechanism forVehicles, of which the following is a specification.

This invention relates to brake mechanism or winches of a well knowntype useful for railway and tramway vehicles, such mechanism having arotatable cylindrical winding drum or a specially constructed windingdrum somewhat similar to a fusee having a helicoidal groove to receivethe brake operating chain which is wound on the drum under a varyingleverage. Usually this winding drum is provided with an external gearwheel which is driven by a pinion secured to the end of the brake staff.

It has also been previously proposed to employ a stop device for thepurpose of preventing excessive unwinding of the chain from the drum.The device heretofore employed consists of a lug or tooth provided onthe driven gear wheel, which lugengages another lug either provided onthe driving pinion or on the stationary frame of the mechanism. Thearrangementis such that when the drum makes almost a complete turn, thelugs strike againstone another and stop further turning movement of thedrum in the direction for unwinding. According to this knownconstruction a limited length of chain is unwound from the drum and thewinding movement of the drum for applying the brakes isdisadvantageously limited.

The object of the present invention is to provide an improved form ofbrake mechanism having the distinctive useful features of novelty;firstly, that the winding drum is so supported that driving gearing ofthe desired ratio may readily be adopted; and secondly, that excessiveunwinding of the chain, thus causing undesired slackness in the same, iseffectually prevented, while the winding movement of the drum is notrestricted by the device which limits the unwinding movement.

Tn accordance with the invention the mechanism comprises a body portionprovided with means for attaching the same on or under the flooring ofthe platform. The winding drum is supported by the body portionindependently of the driving gear Specification of Letters Patent.

. portion.

BRAKE MECHANISM FOR VEHICLES.

Patented Nov. 7,. late. Serial No. 765,021.

which is detachably supported by the bodv Still in accordance with theiiivention, a clutch device or arrangement of stops is provided forlimiting the turning movement of the drum in one direction of travelonly, this device consisting of a stop or.pro ection permanentlystationary with the body portion of the mechanism, .1: fixed stopcarried by the drum'and an intermediate rotating ring member having alug projecting from the periphery of the ring.

A form or forms of brake mechanism em bodying the invention willbehereinaftermore fully described with .reference to the accompanyingdrawings, in which Figures 1, 2 and 3 are, respectively, a side, front.and rear elevation of the improved mechanism; Fig. -l is a rearelevation of the same showing the winding drum removed; Fig. 5 is avertical section showing part of the yoke or frame broken away; Figs. 5and 5 are detail sectional views of the means for mounting the drivingpinion, Fig. 5 being taken on the line a m of Fig. 5, and Fig. 5illustrates a modification; Fig. 6 is a detail plan view of the gearing;Fig. 7 is a detail plan view showing a modified manner of attaching themechanism to the car platform flooring; Figs. 8, 9 and 10 are detailviews showing diagrammatically the different positions of the stopsemployed for limiting the unwinding movement of the drum, and Fig. 11 isa perspective view.

showing the parts of the said device in a disassembled condition.

Referring to the drawings. A is the body portion of the mechanismconsisting mainly of the yoke B open at the front end to allow clearpassage of the brake chain.

C is a plate or member provided with lugs D carried by the body portion,which lugs are adapted to register with lugs D of yoke B and thusprovide means whereby the said plate can be detachably secured to theyoke and for attaching the latter member to the car flooring I. Pinion Eis supported by the plate L and this pinion meshes with internal gearingF provided in the hollow crown portion of the winding drum T. The pinionE is providedwith a socket which receives the squared end of the brakestaff 0,

the movement of which brake statf is retardportion which provides abearing for the helicoidal groove to receive the chain which isattachedto the drum by means of the pin H. The drum T is supported on avertical axis consisting of a stud shaft Gr firmly supported at thelower end or base of the yoke 13. The drum is merely dropped in placeand rotates freely on the stud shaft, and the hole Z provides means forlubricatiom \Vith the improved construction, the brake mechanism canreadily be assembled and attached to il e underside of the car flooringin different positions according to the requirements. In assembling themechanism, first of all the brake drum, with one end of-the chainattached thereto, isdropped" on to the stud and then the plate C withthe pinion is placed in position, and the complete mechanism can then beattached to the car flooring by means of the lugs ,D and D. The brakestaff is then inserted into'the socket and supported in the usualmanner.

In Fig. 5? a modified means of attaching the pinion is shown. In thisinstance the plate I is formed integral with the hub of the pinion wheeland serves as a shoulder and the squared end L of the hub receives thepinion E which is secured by means of a pin tosaidhub.

The hollow interior of the crown portion having the internal gearing, isentirely free of parts of the' mechanism, thereby permitting of theemployment of'pinion wheels of various sizes so as to obtain anypracticable ratio of transmission required for rotating the drum whichis made of a standard size. The plate C carrying thepinion can bereadily attached to the body portion of the mechanism and this featurehas considerable advantage over the constructions hereinbefore proposedas regards facility in changing the gearing.

The other part of my invention relates to the means for restricting theunwinding inovement of the drum, as shown more clearly in Figs. 8, 9,10, and 11, and. reference is now made to these figures. The

lower extremity of the winding drum T is provided with an annular grooveT broken by a stop 1. The base of the yoke B is provided with a circularseat B having locking projections which engage similar projections on aring E the purpose of this arrangement being to permit adjustment, or insuch instances where adjustment is not required, the ring B can bedispensed with and in this instance the lug or stop 3 carried by thesaid ring would form an integral part of the base of the yoke. Anintermediate ring or washer B is provided with'a' lug 2 projecting fromthe periphery thereof. It will be understood that when the lug 1 meetsthe lug 3 in either direction of travel, the unwinding or windingmovement of the drum would be limited accordingly, but by provision ofthe intermediate member, having the engaging lug 2, amplified movementof the drum is permitted, for the lug car ried by this member is soarranged that the lugs 1 and 3 are engaged without the limiting effectbeing produced when the drum is rotatedin the direction for unwinding.Figs. 8, 9, and 10 show the operation of this arrangement of the stops.In the first position (Fig. 8) the drum may be wound in the direction ofthe arrow to wind the chain and with the parts in the positionillustrated, the, lug 3 rests on the lug 2 -and the 'lug' 2 meets thestop 1. If the brake drum is then turned to wind the chain, that is inthe direction of the arrow, the lug 1' makes almost acomplete revolutionand then again meets the lug 3, as shown in Fig. 9. In this position themovement of the drum is not limited, for as the lug 2 is thicker thanthe ring or washer, the lug 1 drives the lug 2 in front of it. The drumwill only be stopped when the lugs reach the position in. Fig. 10, inwhich position, the lug 2 has met'lug 3, and the lug 1 is in a positionfor the free rotation of the drum in the direction for unwinding thechain. As previously stated thearrangement of stops. may be madeadjustable and forfthis purpose the ring B carrying with it-the stop 3,may be placed at various angles relatively to the stop 1. This stop maybe made of different thick ness so as.to limit the unwinding move mentaccordingly.

In general practice the brake mechanism is mounted underneath theplatform-in the position shown in dotted lines (Fig. 7), and the brakestafl and operating handle are carried within the platform. In suchinstances where space is limited on the platform, the brake mechanism ismounted as illustrated partly in' full lines in Fig. 7. In thisinstance, the brake shaft and operating handle and part of the mechanismare carried outside the dashboard M, a suitable bracket'M being providedto support the brake mechanism and operating devices.

It will be understood that the improvements hereinbefore detcribed'maybe separately or jointly. employed with brake mchanismsliaving eitheracylindrical or a tapering winding drum. i

I claim:.

1. In a brake mechanism, a winding drum supported on a seating providedby the base of a body portion and means consisting of a stop on thelower extremity of the drum engaging a stop on said seating and anintermediate loose ring having a lug for limiting the unwinding movementof the winding drum.

2. In a bralre nri'echanism the combination of a body portion supportinga Winding.

drum mounted on a stud shaft, internal gearing and a pinion providedWithin the hollow. crown of the Winding drum for driving the same andmeans consisting-of a body portion for limiting theunwinding movement ofthe Winding drum.

3. In a brake mechanism, the combination, of abody portion supporting a'Winding drum mounted on a stud shaft, means for driving said drum whichinclude an internal. gearing provided Within. the hollow crown of thedrum and a pinioncarried by a plate secured to the body portion andmeans for limiting the unwinding movement of the drum consisting of astop provided on the lower egtremityof the Winding drum Which stopengages a lug provided on a ringavhich is free to rotate on the saidstud shaft and which lug engages'a stop provided on the body portion ofthe brake mechanism.

In testimony whereof I have hereunto set my hand in the presence of thesubscribing, Witnesses, on this 19th day of April A. 1).,

GIUSEPPE siioco ALBANESE.

Witnesses WERNER HILDEBRAND, LUcIEN MEMMINGER.

